Speaker box



FIG. 1 is a perspective view of a speaker box showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

The broken lines shown are included for the purpose of illustrating portions of the speaker box that form no part of the claim. 

CLAIM The ornamental design for a speaker box, as shown and described. 